# Tag Info

### Sign conventions of inductors in circuit analysis

When the high-side fet , the current flow from Vs to Vo so the voltage across the inductor is VL=Vs-Vo and so the current slope in the inductor is (Vs-Vo)/L … When highside turnoff and low-Side is now ...

### Inductor of twisted pair cable and of a wire

The inductance of a lone wire in free space is something of a misnomer. There are useful measures of free-segment inductance, but it must be applied carefully, as there is no physical meaning until a ...
Accepted

### Inductor of twisted pair cable and of a wire

Twisted pair is not meant to transport a current and the return current to convey information - the information travels as the energy between the two conductors, and always in one direction. So, the ...
1 vote

### Need help understanding transient inductive networks

When the circuit is in the storage phase is R2 shorted? No. If it was being shorted, then it would cause infinite current to flow from E. Perhaps the confusion is that the inductor, L, can be ...
1 vote

### Does all the current lag the voltage in an inductor or is it only a small component?

the way I understood a basic inductive circuit (voltage source + inductor) is that all the circuit current (Io) lags the voltage by 90 degrees. That's correct, for a pure inductance. If the circuit ...

### Is a Joule thief a constant current source?

Neil_UK has already done a fine job describing everything, but I wanted to give a graphical answer to this question, to add to what Neil_UK has said. For the following 6V Joule Thief circuit: Here (...

### DIY Wireless charger isn’t working

You will have a better chance at success with a reliable oscillator. Start with this circuit. https://www.electronicsforu.com/electronics-projects/wireless-led 9 V batteries are very weak, almost ...

### How to deal with one inductor coupled with two different inductors?

You can use definition of "coupling circuits" K. Here is an example of such use.

### Why is the voltage across a capacitor in the Laplace domain equals I(s) / s?

Why is the voltage across a capacitor in the Laplace domain equals I(s) / s? It isn't. $1/s$ means integration, so $I(s)/s$ means integrating $i(t)$ over time i.e. $\int i\ dt$. This is ...

### Why is the voltage across a capacitor in the Laplace domain equals I(s) / s?

Well, the current in the circuit is given by: \text{I}\left(\text{s}\right)=\frac{\displaystyle\text{V}_\text{source}\left(\text{s}\right)}{\displaystyle\text{R}+\text{sL}+\frac{\displaystyle1}{\...

### Complex equations in AC RLC circuits spiralling out of control

Tried to simulate that circuit. Found that it is "stable" with gain <= 1.
Accepted

### Is ferrite core inductance similar to iron?

You are way off base with your inductance calculations, and seem to be ignoring the advice that calculating the inductance is more complicated than just multiplying by the permeability of the core. ...

### Is ferrite core inductance similar to iron?

The formula you're using is wrong -- that's the base case by dimensions alone (i.e. you put together a length and area, and permeability, and you get an inductance), and there is a constant factor due ...
1 vote

### Is ferrite core inductance similar to iron?

This is only a step above the iron rod permeability/inductance (77 micro-H for 35 turns). Which is why 50 or 60 Hz transformers usually use laminated silicon steel, rather than ferrite. Another ...
Accepted

### Power supply coupling of inductive resonant sensors

Power supply filtering is about all you need for most problems like this. A capacitor across the supply for each sensor may be enough, or you may need to add a ferrite bead in series with the supply. ...

### How does an inductor store energy?

The electron, in addition to having an electric charge, also has a spin. Considering a current of electrons in a copper wire due to the presence of an electric field in it , the spin vectors align ...

### How does an inductor store energy?

This is a tough question and you're going to get a variety of answers. Most answers will contain a lot of non-intuitive mathematics. Where, when all is said and done, the only reason is "...

### Can a 6V DC circuit turn on a separate/unconnected DC circuit?

The inductor doesn't do anything visible to the circuit it's a part of. It does still produce a magnetic field (which will be contained within the shielding of shielded inductors, so you need an ...
1 vote

### Can a 6V DC circuit turn on a separate/unconnected DC circuit?

Can a 6V DC circuit be configured switch on a second, and separate, 3V DC circuit? Yes. There's numerous ways to do that: relays, octocouplers, and a few other things are giving you an isolated ...